Are you being serious?
Thread with the same observations: http://forum.arduino.cc/index.php?topic=491056.0
Observation on approach: every value below 210 microseconds will stall the motor. Values between 210 and 280 mostly have a light ot heavy jitter at start.Cause of stall and jtter: unknown.
Why have you started a new Thread when there is a lot of useful info for us in your earlier Thread?Click Report to Moderator and ask to have this merged with the older Thread.You have not told us what you have learned from the earlier Thread....R
My question: why does the motor stall below 210microseconds pausing? Because of the Hz or the Voltage or any other variable/combination?
You need to post your program.If you want a stepper motor to work at high speed it must be accelerated and decelerated so it does not miss steps.The torque of a stepper motor declines significantly with speed - maybe your motor cannot move the load at the higher speed - even with acceleration....RStepper Motor BasicsSimple Stepper Code
Increasing the motor power supply voltage may help because it enables the full motor current to be reached more quickly....R
Maybe think about it like this. If you try to lift a heavy load from the floor to a table it will take you some time during which you are exerting as much force as your muscles can produce. Let's say it takes you 5 seconds. Now think what will happen if you are only allowed to exert that force in bursts of 1 second with complete relaxation in between. The load will never get more than a few centimetres off the floor because when you relax your muscles it will fall back to the floor.Increasing the motor power supply voltage may help because it enables the full motor current to be reached more quickly....R